head to head · open source
KeePassDX vs fido2-net-lib
KeePassDX has 7,613 GitHub stars, 425 forks, 541 open issues and last shipped 4 days ago. fido2-net-lib has 1,458 stars, 201 forks, 20 open issues and last shipped 2 days ago. KeePassDX leads on adoption by 422% (7,613 vs 1,458 stars). KeePassDX is written in Kotlin under GPL-3.0; fido2-net-lib is written in C# under MIT. KeePassDX has attracted 6% as many forks as stars, fido2-net-lib 14%. fido2-net-lib was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (passkeys), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| KeePassDX | fido2-net-lib | |
|---|---|---|
| GitHub stars | ★ 7.6K | ★ 1.5K |
| License | GPL-3.0 | MIT |
| Written in | Kotlin | C# |
| Last push | 2026-11-01 | 2026-11-03 |
| Forks | ⑂ 425 | ⑂ 201 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick KeePassDX if
- You weight community size — 7.6K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Kotlin
- You value the larger contributor base for long-term maintenance
pick fido2-net-lib if
- You want the fido2-net-lib feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and fido2-net-lib fits your workflow better
About KeePassDX
Android KeePassDX Lightweight password safe and manager for Android , KeePassDX allows editing encrypted data in a single file in KeePass format and fill in the forms in a secure way. Features Passkeys for authentication and local storage of private keys . Biometric recognition for fast unlocking (fingerprint / face unlock / …). One Time Password management (HOTP / TOTP) for two factor authentication (2FA). Autofill for easy form filling with passwords. Magikeyboard to efficiently fill in any field. Create encrypted database files . Organisation of credentials by entry and in group trees. Allows opening and…
read the full KeePassDX overview →
About fido2-net-lib
Passkeys FIDO2 .NET Library (WebAuthn) A fully working and battle tested library for passkeys (FIDO2 and WebAuthn) on .NET Releases & Change log 💡 Bitwarden Passwordless API The quickest way to get started with FIDO2 and WebAuthn is with the Bitwarden Passwordless API. It's free up to 10k users and a faster way to start using passkeys on your website or mobile app. Bitwarden Passwordless.dev supports .NET Framework as well as the latest .net 8+. Get started with passwordless.dev Purpose Our purpose is to enable passwordless sign in for all .NET apps (asp, core, native). To provide a developer friendly and well…
read the full fido2-net-lib overview →
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Frequently asked questions
Is KeePassDX or fido2-net-lib more popular?
KeePassDX has 7,613 GitHub stars and fido2-net-lib has 1,458. KeePassDX has the larger community by that measure.
Are KeePassDX and fido2-net-lib free?
Both are open source. KeePassDX is licensed under GPL-3.0 and fido2-net-lib under MIT. Neither carries a licence fee.
What is the difference between KeePassDX and fido2-net-lib?
KeePassDX is written in Kotlin and fido2-net-lib in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, KeePassDX or fido2-net-lib?
Choose KeePassDX if you want the larger community (7,613 stars) or its GPL-3.0 licence terms. Choose fido2-net-lib if its feature set, stack or MIT licence fits better. Both are self-hostable.